Hi

When I look in winch selection guides from Harken, Lewmar and Andersen.
I find the that there is a difference as to the size of winch they
recommend, especially when one looks at the smaller size winches there
is a disagreement between the manufactures, of what size of winch to
recommend. Lewmar generally is one winch size below Andersen, so they
are pretty close. But Harken is 2-3 sizes above Lewmar and Andersen.
If one takes a 300 squre feet Genoa, Lewmar recommends a 14 and
Andersen a 12 or 16. Where as Harken recommends a 40 or 42.
Now there might be a difference between the effectiveness of a winch
brand, but I do not believe this is the course of the difference. Also
I am actually incline to believe that Harkens recommendations is the
most accurate.
Any suggestions as to why there is such a difference, and who is right?

Best regards
Mads